From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:60130 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751473AbcBNVE0 (ORCPT ); Sun, 14 Feb 2016 16:04:26 -0500 Subject: Patch "ext2, ext4: warn when mounting with dax enabled" has been added to the 4.3-stable tree To: dan.j.williams@intel.com, david@fromorbit.com, gregkh@linuxfoundation.org, jack@suse.com, kirill.shutemov@linux.intel.com, tytso@mit.edu, willy@linux.intel.com Cc: , From: Date: Sun, 14 Feb 2016 13:04:25 -0800 Message-ID: <1455483865137198@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled ext2, ext4: warn when mounting with dax enabled to the 4.3-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ext2-ext4-warn-when-mounting-with-dax-enabled.patch and it can be found in the queue-4.3 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From ef83b6e8f40bb24b92ad73b5889732346e54a793 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 29 Sep 2015 15:48:11 -0400 Subject: ext2, ext4: warn when mounting with dax enabled From: Dan Williams commit ef83b6e8f40bb24b92ad73b5889732346e54a793 upstream. Similar to XFS warn when mounting DAX while it is still considered under development. Also, aspects of the DAX implementation, for example synchronization against multiple faults and faults causing block allocation, depend on the correct implementation in the filesystem. The maturity of a given DAX implementation is filesystem specific. Cc: "Theodore Ts'o" Cc: Matthew Wilcox Cc: linux-ext4@vger.kernel.org Cc: Kirill A. Shutemov Reported-by: Dave Chinner Acked-by: Jan Kara Signed-off-by: Dan Williams Signed-off-by: Greg Kroah-Hartman --- fs/ext2/super.c | 2 ++ fs/ext4/super.c | 6 +++++- 2 files changed, 7 insertions(+), 1 deletion(-) --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -566,6 +566,8 @@ static int parse_options(char *options, /* Fall through */ case Opt_dax: #ifdef CONFIG_FS_DAX + ext2_msg(sb, KERN_WARNING, + "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); set_opt(sbi->s_mount_opt, DAX); #else ext2_msg(sb, KERN_INFO, "dax option not supported"); --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1664,8 +1664,12 @@ static int handle_mount_opt(struct super } sbi->s_jquota_fmt = m->mount_opt; #endif -#ifndef CONFIG_FS_DAX } else if (token == Opt_dax) { +#ifdef CONFIG_FS_DAX + ext4_msg(sb, KERN_WARNING, + "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); + sbi->s_mount_opt |= m->mount_opt; +#else ext4_msg(sb, KERN_INFO, "dax option not supported"); return -1; #endif Patches currently in stable-queue which might be from dan.j.williams@intel.com are queue-4.3/ext2-ext4-warn-when-mounting-with-dax-enabled.patch